Parallel flow evaporator

ABSTRACT

A parallel flow evaporator comprises a transitional plate. A left side plate and a right side plate are connected with two side edges of the transitional plate respectively. A first liquid inlet manifold is secured to an upper side edge of a forward side surface of said transitional plate, a first gas outlet manifold is secured to an upper side edge of a rearward side surface of said transitional plate, a second liquid inlet manifold is secured to a lower side edge of the forward side surface of said transitional plate, and a second gas outlet manifold is secured to a lower side edge of the rearward side surface of said transitional plate. A plurality of flat tubes, which are parallel with and distant from each other, are arranged between said first liquid inlet manifold and said second liquid inlet manifold. Said first liquid inlet manifold and said second liquid inlet manifold as well as said first gas outlet manifold and said second liquid inlet manifold communicate with said flat tubes. Between the flat tubes there are arranged a plurality of fins. A left end of the second liquid inlet manifold is connected with a coolant inlet and a left end of the second gas outlet manifold is connected with a coolant outlet. According to the present invention, flat tubes and fins are provided in the parallel flow evaporator, and the liquid inlet manifolds and the gas outlet manifolds are designed as U-tubes, so the heat exchange efficiency of the parallel flow evaporator is improved.

FIELD OF THE INVENTION

This invention relates to the field of mechanics, especially to a heatexchange machinery, more especially to a heat exchanger, particularly aparallel evaporator, which is used in an air conditioner of anautomobile.

BACKGROUND OF THE INVENTION

In the prior art, a heat exchanger used in an air conditioner of anautomobile is consisted of a plurality of evaporators connected inseries. This results in that the air conditioner is bulky and heavy,which increases the load of the automobile. Furthermore, the efficiencyof the heat exchange is low and it is hard to save energy.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a parallel flowevaporator, which can overcome the deficiencies of the prior artautomobile air conditioner that the efficiency of heat exchange is lowand it is hard to save energy.

The parallel flow evaporator of the present invention comprises atransitional plate, wherein a left side plate is secured vertically to aleft side edge of said transitional plate, a right side plate is securedvertically to a right side edge of said transitional plate, a firstliquid inlet manifold is secured to an upper side edge of a forward sidesurface of said transitional plate, a first gas outlet manifold issecured to an upper side edge of a rearward side surface of saidtransitional plate, a second liquid inlet manifold is secured to a lowerside edge of the forward side surface of said transitional plate, and asecond gas outlet manifold is secured to a lower side edge of therearward side surface of said transitional plate; said first liquidinlet manifold, said first gas outlet manifold, said second liquid inletmanifold and said second gas outlet manifold are parallel with eachother; a plurality of flat tubes, which are parallel with and distantfrom each other, are arranged between said first liquid inlet manifoldand said second liquid inlet manifold; said first liquid inlet manifoldand said second liquid inlet manifold communicate with said flat tubes;said first gas outlet manifold and said second liquid inlet manifoldcommunicate with said flat tubes; between the flat tubes there arearranged a plurality of fins; a left end of the second liquid inletmanifold is connected with a coolant inlet and a right end of the secondliquid inlet manifold is closed; a left end of the second gas outletmanifold is connected with a coolant outlet and a right end of thesecond gas outlet manifold is closed; a first partition, a secondpartition, a third partition and a fourth partition are provided in thesecond liquid inlet manifold sequentially from right to left, thepartitions being perpendicular to an axis of the second liquid inletmanifold and distant from each other; said first partition is providedwith one through hole, said second partition is provided with twothrough holes, and said third partition is provided with three throughholes.

Furthermore, both of said coolant inlet and said coolant outlet areprovided on a pressing plate, and said pressing plate is connected withthe left side plate.

Still furthermore, each of the first liquid inlet manifold, the firstgas outlet manifold, the second liquid inlet manifold and the second gasoutlet manifold is U-shaped in cross-section.

The principle of the present invention is as follows: liquid coolantenters the second liquid inlet manifold through the coolant inlet, thenflows through the flat tubes to effect heat exchange, and thus turnsinto gas coolant; after flowing through the first liquid inlet manifoldand the first gas outlet manifold, the gas coolant enters the second gasoutlet manifold and is discharged through the coolant outlet. The flattubes facilitate efficient heat exchange of the coolant with theenvironment, and the fins between the flat tubes increase the area ofheat transfer, so that the heat exchange efficiency is improved. Withthe cross sections of the liquid inlet manifolds and the gas outletmanifolds being U-shaped, the flow resistance is reduced.

Compared with the prior art, the effects of the present invention arepositive and obvious. According to the present invention, flat tubes andfins are provided in the parallel flow evaporator, and the liquid inletmanifolds and the gas outlet manifolds are designed as U-tubes, so theheat exchange efficiency of the parallel flow evaporator is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front schematic view of a parallel flow evaporator of thepresent invention;

FIG. 2 is a bottom schematic view of a parallel flow evaporator of thepresent invention;

FIG. 3 is a left schematic view of a parallel flow evaporator of thepresent invention.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIGS. 1, 2 and 3, the parallel flow evaporator of thepresent invention comprises a transitional plate 12, wherein a left sideplate 5 is secured vertically to a left side edge of said transitionalplate 12, a right side plate 6 is secured vertically to a right sideedge of said transitional plate 12, a first liquid inlet manifold 13 issecured to an upper side edge of a forward side surface of saidtransitional plate 12, a first gas outlet manifold 14 is secured to anupper side edge of a rearward side surface of said transitional plate12, a second liquid inlet manifold 3 is secured to a lower side edge ofthe forward side surface of said transitional plate 12, and a second gasoutlet manifold 4 is secured to a lower side edge of the rearward sidesurface of said transitional plate 12; said first liquid inlet manifold13, said first gas outlet manifold 14, said second liquid inlet manifold3 and said second gas outlet manifold 4 are parallel with each other; aplurality of flat tubes 7, which are parallel with and distant from eachother, are arranged between said first liquid inlet manifold 13 and saidsecond liquid inlet manifold 3; said first liquid inlet manifold 13 andsaid second liquid inlet manifold 3 communicate with said flat tube 7;said first gas outlet manifold 14 and said second liquid inlet manifold3 communicate with said flat tubes 7; between the flat tubes 7 there arearranged a plurality of fins 8; a left end of the second liquid inletmanifold 3 is connected with a coolant inlet 1 and a right end of thesecond liquid inlet manifold 3 is closed; a left end of the second gasoutlet manifold 4 is connected with a coolant outlet 2 and a right endof the second gas outlet manifold 4 is closed; a first partition 15, asecond partition 16, a third partition 17 and a fourth partition 9 areprovided in the second liquid inlet manifold 3 sequentially from rightto left, the partitions being perpendicular to an axis of the secondliquid inlet manifold 3 and distant from each other; said firstpartition 15 is provided with one through hole, said second partition 16is provided with two through holes, and said third partition 17 isprovided with three through holes.

Furthermore, both of said coolant inlet 1 and said coolant outlet 2 areprovided on a pressing plate 11, and said pressing plate 11 is connectedwith the left side plate 5. A connecting plate 10 is provided betweenthe pressing plate 11 and the left side plate 5.

Still furthermore, each of the first liquid inlet manifold 13, the firstgas outlet manifold 14, the second liquid inlet manifold 3 and thesecond gas outlet manifold 4 is U-shaped in cross-section.

1. A parallel flow evaporator comprising a transitional plate, wherein aleft side plate is secured vertically to a left side edge of saidtransitional plate, a right side plate is secured vertically to a rightside edge of said transitional plate, a first liquid inlet manifold issecured to an upper side edge of a forward side surface of saidtransitional plate, a first gas outlet manifold is secured to an upperside edge of a rearward side surface of said transitional plate, asecond liquid inlet manifold is secured to a lower side edge of theforward side surface of said transitional plate, and a second gas outletmanifold is secured to a lower side edge of the rearward side surface ofsaid transitional plate; said first liquid inlet manifold, said firstgas outlet manifold, said second liquid inlet manifold and said secondgas outlet manifold are parallel with each other; a plurality of flattubes, which are parallel with and distant from each other, are arrangedbetween said first liquid inlet manifold and said second liquid inletmanifold; said first liquid inlet manifold and said second liquid inletmanifold communicate with said flat tube; said first gas outlet manifoldand said second liquid inlet manifold communicate with said flat tubes;between the flat tubes there are arranged a plurality of fins; a leftend of the second liquid inlet manifold is connected with a coolantinlet and a right end of the second liquid inlet manifold is closed; aleft end of the second gas outlet manifold is connected with a coolantoutlet and a right end of the second gas outlet manifold is closed; afirst partition, a second partition, a third partition and a fourthpartition are provided in the second liquid inlet manifold sequentiallyfrom right to left, the partitions being perpendicular to an axis of thesecond liquid inlet manifold and distant from each other; said firstpartition is provided with one through hole, said second partition isprovided with two through holes, and said third partition is providedwith three through holes.
 2. The parallel flow evaporator according toclaim 1, wherein both of said coolant inlet and said coolant outlet areprovided on a pressing plate, and said pressing plate is connected withthe left side plate.
 3. The parallel flow evaporator according to claim1, wherein each of the first liquid inlet manifold, the first gas outletmanifold, the second liquid inlet manifold and the second gas outletmanifold is U-shaped in cross-section.